Add a Haskell program which spawns an external process.
catseye
13 years ago
| 0 | module Main where | |
| 1 | ||
| 2 | import System.IO | |
| 3 | import System.Process | |
| 4 | ||
| 5 | cat handle = do | |
| 6 | eof <- hIsEOF handle | |
| 7 | if | |
| 8 | eof | |
| 9 | then do | |
| 10 | return () | |
| 11 | else do | |
| 12 | line <- hGetLine handle | |
| 13 | putStr ">>>" | |
| 14 | putStr line | |
| 15 | putStrLn "<<<" | |
| 16 | cat handle | |
| 17 | ||
| 18 | main = | |
| 19 | let | |
| 20 | cmd = (shell "ls -la *.hs"){ std_out = CreatePipe } | |
| 21 | in do | |
| 22 | (_, Just hStdout, _, proc) <- createProcess cmd | |
| 23 | cat hStdout | |
| 24 | exitCode <- waitForProcess proc | |
| 25 | putStrLn (show exitCode) | |
| 26 | return () |